supposed to be Window 1, but a cut'n'paste error made it stomp over
Window 0, thus breaking ISA DMA. Fix this. (Confirmed to work with
floppy driver.)
While I'm here, do something I've been meaning to do for a while: change
Window 1 from a 1G at 2G to a 2G at 2G direct-mapped window, and add
a Window 2 of 1G at 1G SGMAP-mapped. Chain Window 2 to Window 1, and
use it as a fall-back for PCI DMA if the system has more than 2G of RAM.
The access is more efficient this way (and this was done in the interrupt
dispatch code, so some cycles are actually shaved), and gcc gets annoyed
when chars are used as array subscripts.
- Adjust for the fixed Rawhide console initialization.
- When mapping a PCI interrupt, don't always map device 1 to IRQ 16. Device
1 is only the internal 53c810 on MID 5, and is an invalid device number
on any other MID.
- Adjust for change mcpcia_config/mcpcia_softc structures.
- Nuke the kludgy linked list of mcpcia_softc structures. Instead, just
use savunit[v] to index into mcpcia_cd.cd_devs[] to find the MCPCIA
which has the stray interrupt.
- Some other minor cosmetic cleanup.
which holds state of the MCPCIA to which the console is attached.
- All MCPCIA info is now stored in the mcpcia_config structure; the
mcpcia_softc only contains a struct device and a pointer to one of these.
- If attaching the console MCPCIA, use the static configuration, else allocate
the substructure.
- Rename mcpcia_init() to mcpcia_init0(), and make it take a "mallocsafe"
argument.
- Implement a new mcpcia_init(), which looks for the MCPCIA which has the
EISA bridge attached. Initialize this MCPCIA as the console MCPCIA (the
console on the Rawhide is only allowed on this MCPCIA; firmware rule).
- Eliminate the kludgy linked listed of mcpcia_softcs. Just use mcpcia_cd
to find all configured instances.
Separate bug fix: Actually clear the MCPCIA error mask after probing for
PCI (and ISA) devices, don't just clear it twice in mcpcia_init0().
Some other slight cleanup.
MID order.
- Export the shuffled MID order; other files now need it.
- Don't derive the GID from the unit number of the mcbus. A user could
render his kernel non-bootable by using a different unit number in the
kernel config file. We (and the hardware) only support one MCBUS, so
simply use instance 0. Note that this will need to be adjusted if there
are even any multiple-MCBUS systems.
Instead of using the PROM console until autoconfiguration is complete (at
which time we called dec_kn300_cons_init() directly!), make this work like
basically all of the other systems which have PCI attached consoles. That
is, initialize the PCI chipset which holds the console early, and perform
console initialization at the correct time.
This should make both PCI and ISA display consoles with PC keyboards work
(i.e. the deskside workstation version of the Rawhide).
EIO. The spec says ATAPI devices should support "PIO 3 or better".
They are supposed to support less as well. Setting the device to a highter
mode than the controller shoul'nt be a problem, and this is likely what
happens with legaty ISA controllers.
Solve problem reported by Ruey-Shyang Guo.
simonb